JS formats numerical amounts separated by commas and retains two decimal places

JS formats numerical amounts separated by commas and retains two decimal places_javascript skills

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Release： 2016-05-16 17:19:42

Original

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For example:
12345 is formatted as 12,345.00
12345.6 is formatted as 12,345.60
12345.67 is formatted as 12,345.67
Leave only two decimal places.
After I came back, I wrote a formatting function. You can control the number of decimal places and automatically round off. The code is as follows:

Copy code The code is as follows:

 
function fmoney(s, n) { 
n = n > 0 && n <= 20 ? n : 2; 
s = parseFloat((s "").replace(/[^d.-]/g, "")).toFixed (n) ""; 
var l = s.split(".")[0].split("").reverse(), r = s.split(".")[1]; 
t = ""; 
for (i = 0; i < l.length; i ) { 
t = l[i] ((i 1) % 3 == 0 && (i 1) ! = l.length ? "," : ""); 
} 
return t.split("").reverse().join("") "." r; 
} 
 

Call: fmoney("12345.675910", 3), return 12,345.676
Restore function:

Copy code The code is as follows:

 
function rmoney(s) { 
return parseFloat(s.replace(/[^d.-]/g, "")); 
} 

Example (you can save the code as an html file and run it to see the effect):

Copy the code The code is as follows :

<SCRIPT> function fmoney(s, n) { n = n > 0 && n <= 20 ? n : 2; s = parseFloat((s "").replace(/[^d.-]/g, "")).toFixed(n) ""; var l = s.split(".")[0]. split("").reverse(), r = s.split(".")[1]; t = ""; for (i = 0; i < l.length; i ) { t = l[i] ((i 1) % 3 == 0 && (i 1) != l.length ? "," : ""); } return t.split ("").reverse().join("") "." r; } function rmoney(s) { return parseFloat(s.replace(/[^d.-]/ g, "")); } function g(id) { return document.getElementById(id); } window.onload = function() { var num, txt = g("txt"), txt2 = g("txt2"), btn = g("btn"), btn2 = g("btn2"), span = g("span"); btn.onclick = function() { num = parseInt(g("num").value); txt.value = fmoney(txt.value, num); txt2.value = fmoney( txt2.value, num); }; btn2.onclick = function() { num = parseInt(g("num").value); span.innerHTML = "=" fmoney(rmoney(txt.value) rmoney(txt2.value), num); }; }; </SCRIPT>
Decimal points:
< ;select id="num">

< option value="4">4

Attach:

Copy code The code is as follows:

 
/* 
* formatMoney(s,type) 
* Function: Split the amount by commas in thousands 
* Parameter: s, the amount value that needs to be formatted. 
* Parameter : type, determine whether the formatted amount requires decimal places. 
* Return: Return the formatted numerical string. 
*/ 
function formatMoney(s, type) { 
if ( /[^0-9.]/.test(s)) 
return "0"; 
if (s == null || s == "") 
return "0"; 
s = s.toString().replace(/^(d*)$/, "$1."); 
s = (s "00").replace(/(d*.dd)d*/ , "$1"); 
s = s.replace(".", ","); 
var re = /(d)(d{3},)/; 
while (re. test(s)) 
s = s.replace(re, "$1,$2"); 
s = s.replace(/,(dd)$/, ".$1"); 
if (type == 0) {// Without decimal places (default is with decimal places) 
var a = s.split("."); 
if (a[1] == "00") { 
s = a[0]; 
} 
} 
return s; 
} 
/* 
* General DateAdd(interval,number,date) Function: Implementation Date addition function of javascript. 
* Parameter: interval, string expression, indicating the time interval to be added. Parameter: number, numerical expression, indicating the number of time intervals to be added. Parameter: date, time Object. 
* Return: new time object. var now = new Date(); var newDate = DateAdd("day",5,now); 
* author:devinhua(starting from ○) update:2010 -5-5 20:35 
*/ 
function DateAdd(interval, number, date) { 
if (date == null) 
return ""; 
switch (interval) { 
case "day": 
date = new Date(date); 
date = date.valueOf(); 
date = number * 24 * 60 * 60 * 1000; 
date = new Date(date); 
return date; 
break; 
default: 
return ""; 
break; 
} 
} 